Honda TRX450R Service Manual page 204

CYLINDER HEAD/VALVE
Remove the tensioner lifter sealing bolt and washer.
'04- '05: Turn the cam chain tensioner lifter shaft clockwise
fully and secure it with the special tool to loosen the
tensioner lifter.
TOOL:
Cam chain tensioner holder 07ZMG-MCAA400 or
07AMG-001A100
(U.S.A only)
After '05: Turn the cam chain tensioner lifter shaft clockwise
fully and secure it with the special tool to loosen the
tensioner lifter.
TOOL:
Tensioner stopper 070MG-0010100 or
07AMG-001A100
(U.S.A only)
Loosen the decompressor cam bolt while holding
the crankshaft If the decompressor cam will be
removed.
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